Jones, who served a one-year suspension for violating the NFL's personal conduct policy, reportedly became involved in an incident with one of his bodyguards while they were at a Dallas hotel Tuesday night.
Police were called to the scene, but no arrests were made and no charges filed.
Cowboys owner Jerry Jones said the player and his personal security guard were "kidding around."
"It went a little too far," the team owner said. "It went over the boundary. They resolved it and went home."
NFL Commissioner Roger Goodell said the league was gathering information.
"We're trying to determine all the facts," Goodell said. "It's clear there was some type of incident."